Under Section 40(a)(1) of the Act, the 35-day period for petitioning for a hearing may be extended by the applicant for a period of time not to exceed 90 days by written notice provided to the Board from the applicant and the Agency within the initial appeal period. [ 415 ILCS 5/40(c) ] The applicant and the Agency must jointly file a request for extension with the Board within 35 days after the date of service of the Agency's final decision. Upon an appropriately filed request for an extension, the applicant has a period not exceeding 125 days after the date of service of the Agency's final decision to file a petition for review before the Board under Section 105.408.
Ill. Admin. Code tit. 35, § 105.406